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Project Overview

Starting as early as Monday, March 4, the City of Boulder’s Open Space and Mountain Parks (OSMP) Department will start construction of the Vesper Trail, a new 1.5-mile trail section that will be built on Gunbarrel Hill near the intersection of 75th Street and Lookout Road.

The new trail aims to provide improved visitor experiences in the area to support a variety of uses, protect bird nesting habitat, provide visitors views of the Front Range and the Continental Divide, and allow the public to observe ground-nesting birds in the area – including the Vesper Sparrow.

The new Vesper Trail will be built on Gunbarrel Hill northeast of Boulder and will be accessible from the East Boulder - Gunbarrel Trail



Closures

OSMP highly encourages Gunbarrel-area residents to visit OSMPTrails.org to see trail closures along the East Boulder - Gunbarrel Trail that will be implemented to construct the new trail and make trail repairs in the area. The department will also place signs with closure maps and information along the East Boulder - Gunbarrel Trail to inform visitors of trail closures. Starting May 13, the entire East Boulder - Gunbarrel Trail will be closed from the Boulderado and Cambridge access point to the East Boulder - White Rocks Trailhead on 95th Street. The segment from the Boulderado and Cambridge access point east to the water tank will be closed during construction hours 8 am-5 pm, Monday - Friday. East of the water tank to 95th will be closed 24/7 for the duration of the project. OSMP anticipates completing the new Vesper Trail in late June 2024.

Ecological Habitat Restoration and Recreation Improvements

As part of this new trail construction project, OSMP also will:

  • Close and restore undesignated trails near the Vesper Trail that impact habitat conditions for grassland songbirds and help protect 165 acres of grasslands that support vesper sparrows, grasshopper sparrows and other ground-nesting birds.
  • Seed grassland areas with native vegetation to help improve habitat for ground-nesting birds and other wildlife species.
  • Surface the new Vesper Trail with road base to minimize erosion and reduce muddy trail conditions in the area.
  • Conduct significant trail repairs along the entire length of the East Boulder – Gunbarrel Trail from the access point at Boulderado and Cambridge Streets to 95th Street.
  • Update the access point at the intersection of Boulderado and Cambridge Streets to standardize visitor infrastructure and create a more welcoming and functional layout. This will include new waste receptacles, bike racks, interpretive signage and seating.

The construction of the new Vesper Trail is the first Gunbarrel Hill Integrated Site Plan recommendation OSMP plans to implement. Other ecological and recreational recommendations – including additional trail construction efforts – were identified in the Integrated Site Plan (ISP) process, which the City of Boulder Open Space Board of Trustees approved in 2020. The objectives of the plan include enhanced opportunities for access and enjoyment, restore and conserve the high-quality habitats on Gunbarrel Hill and partnering with the community in planning, design and stewardship efforts.

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